What is the standard way to render each mesh at their respective locations?

Question

I have a single mesh, and I give the vertex-shader a matrix which holds the objects position, scale and rotation. It seems to work.

in vec3 position;
uniform mat4 object;
uniform mat4 view;
uniform mat4 proj;

void main() {
   gl_Position = proj * view * object * vec4(position, 1.0);
}

What if I have multiple meshes? What is the standard way to approach this? Feed in a different mat4 for every mesh rendered, or have separate vertex shaders for each mesh?

Answer 1

Each mesh gets a different object matrix (world transformation matrix).

A common sequence of rendering multiple meshes is :

• Use shader program
• Set the uniforms for Mesh1
• Bind VAO/VBO's for Mesh1

• Draw

• Set uniform for world matrix for Mesh2

• Bind VBO/VAO for Mesh2

• Draw

  ....